Update app.py

app.py

@@ -100,8 +100,8 @@ def main():
         submit_btn.click(add_text_to_chat_history, [chat_history, user_txt], [chat_history, user_txt]).then(show_history, [chat_history], [chatbot])\
                   .then(kadi_bot.handle_chat, [chat_history], [chatbot])        
         clear_btn.click(
-            lambda: ([], "", ""),  # Reset chat history, chatbot, and user text
-            None,  
+            lambda: ([],),  # Reset chat history
+            None,
             [chat_history, chatbot, user_txt],  
             queue=False
         )